Answer:
9
Explanation:
What we have to note is that the slope of a line is rise/run. This means that the amount of y change in that line is 4, and the amount of x change is 3.
We can now use a proportion to find the value of w.
![(4)/(3) = (12)/(x)](https://img.qammunity.org/2021/formulas/mathematics/college/5mxudqtm6hor6oz81fm39j9wmfb2apftpb.png)
Cross multiply:
![12\cdot36 = 36\\\\36/4=9](https://img.qammunity.org/2021/formulas/mathematics/college/fceptuhkwij6j6c1tzsx5b9y9obee1pxu8.png)
Hope this helped!